Club like strip club, or club like dance club? Or am I way off base here?
If you're talking strip club, most clubs (from what I've seen, I've danced at three clubs so far) are pretty much constantly doing auditions for new dancers, if that's what you have in mind. I can't really tell you about waitressing/bartending/being a shot girl in a club, if that's more what you had in mind, but I've seen quite a few girls start as dancers and become waitresses/bartenders, as well as vice versa.
I have more to say on this - as a current strip club dancer - but I want to make sure I understood you correctly before I make a fool of myself and answer a question you didn't even ask =P